Adjustable-angle pivot-typerod joint



April 18, 1950 R. D. BOYD ADJUSTABLE-ANGLE PIVOT-TYPE ROD JOINT l Filed March l1, 1947 Patented Apr. 18,' 1950 Nen;

v Amministra@ RGD J OIN'I Raymond Daley Boyd, vSan Antonio, Tex.

Application March 11, 1947, Serial No. 733,895

2 Claims.

This invention relates to tools and more particularly to those of the wrench type and especially those pertaining to shank extensions employed with same to manipulate bolts or nuts disposed in hard-of-access locations.

It is an obiect of the present invention to provide a new and improved wrench shank that will avoid one or more of the disadvantages and limitations of the prior art.

.lmother obiect of the invention is to provide a new and improved wrench shank that will afford a strong form of holder for the replaceable socket heads used in connection therewith.

A further obiect of the herein described invention is to provide a new and improved wrench that will permit the operating head used therewith to be readily manipulated for replacement and also to be held substantially in position when in use.

Other objects will become apparent as the in vention is more fully set forth.

In order to clarify this invention and explain the principles thereof, reference is made to the appended drawings and the following description, wherein a particular form of the invention is outlined by way of example, while the claims particularly point out the scope of the invention.

In the drawings shown:

Figure 1 is a side elevational view of a wrench shank embodying this invention;

Figure 2 is a plan view of Figure 1; and

Figure 3 is an end view of Figure 2.

Similar reference characters refer to similar parts throughout the drawings.

In the construction indicated in the drawings, lll represents the shank extension of a wrench of conventional form. One end portionl I! is swaged out or enlarged and provided with a polygonal recess I2 into which the tongue of a preceding wrench shank (not shown) is inserted to operate it. The other end portion I 3 of the shank extension II! is also swaged out to form a bifurcated jaw internally arcuate and laterally open cn opposite sides to permit the insertions and rotation of an operable head I4 adaptable with a male end socket-engaging projection I5 for insertion in a socket to be rotated thereby. The head I4 has a rounded rib I'I straddled over its peripheral surface I8 and arranged to t at its back and sides into an arcuate groove I 8 provided in "the shank I D. Thehead i4 has two sides 2l)l A-iiat and tted close against the inner side surfaces 2| of the jaw lwhich serve to restrain it from turning inside the jaw, The jaw I3 however holds it bodily and allows it to rotate when the shank extension is turned. A passage 22 runs transversely through the jaw sides and aligns with a passage 23 in the head I4 so that a pin 26 of cylindrical contour may be passed through both to hold them together as a unit. The projection I5 has a conventional ball lock 24 arranged to secure it to the socket of the extension that the projection may be attached to at the time. Likewise a ball lock 25 is provided in the recess I2 for a similar purpose.

The removal of the head is readily performed by removing the pin 26 and withdrawing the operable head E4 from between sides 2l of the jaw I3. The rib Il, which is preferably knurled, facilitates this operation, as it enables the head to be readily grasped between the fingers of the operator. The head may be rotated on the pin 26 through an arc as long as that of the rib I1 and at the same time be substantially held within the jaw I3. This jaw also distributes the stresses exerted on the head to the shank proper and relieves the sides 2| and pin 26 from having to take care of all the torsional pressure placed upon it.

The knurling on the rib I1 does not interfere with the rotation of the head I4 in the groove I9 as there is suiilcient clearance to permit this. A ball lock 34 fits into indentations 35 in rib I'I. The pin 26 holds the head properly positioned in the jaw I3 to provide the clearance at the groove I9.

While but one general form of the invention is shown in the drawings and described in the specications, it is not desired to limit this application for patent to this particular form or in any other way otherwise than limited by the scope thereof, as it is appreciated that other forms of construction could be made that would use the same principles and come within the scope of the appended claims:

Having thus described the invention; what is claimed is:

l. A hinged joint comprising a shank having an enlarged end portion provided with a U-shaped slot forming spaced ears having confronting parallelsurfaces, said surfaces merging into a transverse-surface of said shank and forming the bot- Y torn of said U-shaped slot, said transverse surface being transverselyconcave, axially aligned pivot means provided in said ears, an arcuate transversely extending slot formed in said concave sur- .face, said arcuate slot and said concave surface having a curved peripheral surface complementary to the concave surface of said shank and to said-rib and arcuate slot being complementary in cross-sectional size to thereby prevent excessive torsional strain on said pivot means.

2. In the hinged joint described in claim 1,

spaced indentations provided in said rib, and a ball lock positioned in said arcuate slot to engage a selected indentation to frictionally hold said head member in a selected position.

RAYMOND DALEY BOYD.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Numb er Name Date 952,435 Miller Mar. 15, 1910 1,448,962 Hughes Mar. 20, 1923 2,294,510 Nakano Sept. 1, 1942 

